JP7417641B2 - Batteries, power consumption devices, battery manufacturing methods and devices - Google Patents

Description

TECHNICAL FIELD Embodiments of the present application relate to the field of batteries, and in particular to batteries, power consuming devices, and methods and apparatus for manufacturing batteries.

Energy conservation and emission reduction are the keys to the sustainable development of the automobile industry. In this case, electric vehicles have become an important part of the sustainable development of the automobile industry due to their energy-saving and environmentally friendly advantages. For electric vehicles, battery technology is one important element related to their development.

In the development of battery technology, in addition to improving battery performance, safety issues are also issues that cannot be ignored. If the safety issues of the battery cannot be ensured, the battery cannot be used. Therefore, how to improve the safety of batteries is a technical problem that urgently needs to be solved in battery technology.

Embodiments of the present application provide a battery, a power consumption device, a method and apparatus for manufacturing a battery, and can improve the safety of the battery.

According to a first aspect, there is provided a battery, the battery cell including a pressure relief mechanism, the pressure relief mechanism being installed on a first wall of the battery cell, and the pressure relief mechanism controlling the internal pressure of the battery cell. or a battery cell that is activated to release the internal pressure when the temperature reaches a threshold value, and a thermal management member that accommodates a fluid and adjusts the temperature of the battery cell; A first surface of a thermal management member is attached to the first wall of the battery cell, and the thermal management member is ruptured by emissions expelled from within the battery cell when the pressure relief mechanism is actuated to The effluent is configured to pass through the thermal management member.

In the technical solution of the embodiment of the present application, the first surface of the thermal management member is attached to the first wall where the pressure relief mechanism is installed, so that when the pressure relief mechanism is activated, the discharge of the battery cell is heated. the thermal management member is configured to be disrupted by the exhaust discharged from within the battery cell when the pressure relief mechanism is actuated to pass the exhaust to the thermal management member. . In this way, the waste can be quickly evacuated through the thermal management member and away from the battery cell, reducing risks and thereby increasing the safety of the battery.

In some embodiments, the thermal management member is provided with a thinned region, and the thinned region is disrupted by the effluent when the pressure relief mechanism is actuated, directing the effluent to the thinned region. is configured to pass through.

Providing a thinned region can facilitate passage of exhaust through the thermal management member.

In some embodiments, the thinned region and the pressure relief mechanism are located opposite each other. Thus, when the pressure relief mechanism is actuated, the ejecta can directly impinge on the thinned region and open the thinned region.

In some embodiments, the thermal management member is provided with a groove located opposite the pressure relief mechanism, and the thinned region is formed in a bottom wall of the groove.

In some embodiments, the groove is located on a surface of the thermal management member facing the first wall.

In some embodiments, the thermal management member includes a first thermally conductive plate and a second thermally conductive plate, the first thermally conductive plate being between the first wall and the second thermally conductive plate. and attached to the first wall, a first region of the first heat conductive plate is recessed toward the second heat conductive plate to form the groove, and the first region is attached to the second heat conductive plate. connected to the board.

In some embodiments, a through hole is installed in the first region, and the radial size of the through hole is less than the radial size of the groove.

In some embodiments, the thickness of the second heat conductive plate corresponding to the through hole is less than the thickness of the second heat conductive plate in other areas. In this way, the thinned region is more easily destroyed by the exudate.

In some embodiments, the thickness of the thinned region is 3 mm or less.

In some embodiments, the thinned region has a lower melting point than the remainder of the thermal management member.

In some embodiments, the material from which the thinned region is made has a melting point of less than 400°C.

In some embodiments, a portion of the thermal management member located around the thinned region is disrupted by the exudate, causing the fluid to exit from the interior of the thermal management member.

When the pressure relief mechanism is actuated, the thermal management member is destroyed and fluid is discharged from the interior of the thermal management member, thus absorbing the heat of the battery cells, lowering the temperature of the effluent, and It can reduce the risk of emissions.

In some embodiments, the sides of the groove are disrupted by the exhaust material, allowing the fluid to exit the interior of the thermal management member.

When the groove is used, when the pressure release mechanism is activated, the discharged material of the battery cell enters the groove, and since the bottom wall of the groove is thin, the discharged material destroys the bottom wall of the groove. effluents that enter the collection cavity and into the grooves further simultaneously melt the sides of the grooves, causing fluid to exit from the interior of the thermal management member, thereby removing hot effluents. to cool down.

In some embodiments, the radial size of the groove gradually decreases in a direction away from the pressure relief mechanism. In this way, the contact area with the waste can be increased and destruction by the waste can be facilitated.

In some embodiments, the groove is configured as a relief cavity that opens when the pressure relief mechanism is actuated.

The escape cavity provides a deformation space for the pressure relief mechanism to deform and rupture the pressure relief mechanism toward the thermal management member.

In some embodiments, the depth of the groove is related to the size of the pressure relief feature.

In some embodiments, the depth of the groove is greater than 1 mm.

In some embodiments, the area of the groove opening is related to the area of the pressure relief feature.

In some embodiments, the ratio of the area of the opening of the groove to the area of the pressure relief mechanism ranges from 0.5 to 2.

In some embodiments, at least a portion of the pressure relief mechanism protrudes from the first wall, and the relief cavity is used to accommodate the at least portion of the pressure relief mechanism.

In this way, the first wall of the battery cell can be closely adhered to the surface of the thermal management member, which can facilitate the fixation of the battery cell, save space and improve the thermal management efficiency. , and when the pressure release mechanism is activated, the discharge of the battery cell can be discharged towards the escape cavity and away from the battery cell, reducing its risk and thereby increasing the safety of the battery.

In some embodiments, a portion of the first wall located around the pressure relief feature protrudes outward, and the escape cavity accommodates a protrusion portion of the first wall located around the pressure relief feature. It is often used.

In some embodiments, an electrode terminal is installed on a second wall of the battery cell, and the second wall is different from the first wall.

By installing the pressure relief mechanism and the electrode terminal on different walls of the battery cell, when the pressure relief mechanism is activated, the battery cell effluent can be further away from the electrode terminal, so that the effluent can be separated from the electrode terminal and the electrode terminal. The impact on the bus member can be reduced, thus increasing the safety of the battery.

In some embodiments, the second wall and the first wall are placed opposite each other.

In some embodiments, the pressure relief mechanism is a temperature sensitive pressure relief mechanism, and the temperature sensitive pressure relief mechanism is configured to melt when the internal temperature of the battery cell reaches a threshold; and/or , the pressure release mechanism is a pressure-sensitive pressure release mechanism, and the pressure-sensitive pressure release mechanism is configured to burst when the internal pressure of the battery cell reaches a threshold value.

In some embodiments, the battery further includes an electrical cavity for accommodating a plurality of the battery cells and a collection cavity for collecting the exhaust when the pressure relief mechanism is actuated; A thermal management member is used to separate the electrical cavity and the collection cavity.

A thermal management member is utilized to separate the electrical cavity housing the battery cells and the collection cavity collecting emissions, such that when the pressure relief mechanism is actuated, battery cell emissions enter the collection cavity and do not enter the electrical cavity. It enters in small amounts or without affecting the electrical connections in the electrical cavity, thus increasing the safety of the battery.

In some embodiments, the thermal management member has a wall shared by the electrical cavity and the collection cavity.

Since the thermal management member is used as a wall shared by the electrical cavity and the collection cavity, it is possible to maximize the separation of emissions and the electrical cavity, thereby reducing the risk of emissions and improving battery safety. enhance sex.

In some embodiments, the battery further includes a protection member for protecting the thermal management member, the protection member forming the collection cavity with the thermal management member.

The collection cavity formed by the protection member and the thermal management member can effectively collect and buffer the emissions, reducing the risk thereof.

In some embodiments, the electrical cavity is isolated from the collection cavity via the thermal management member.

The collection cavity and the electric cavity are not in communication, and liquid or gas etc. in the collection cavity cannot enter the electric cavity, thereby protecting the electric cavity more effectively.

In some embodiments, the thermal management member is configured to be disrupted by the exhaust when the pressure relief mechanism is actuated, such that the exhaust passes through the thermal management member and into the collection cavity. Ru.

According to a second aspect, there is provided a power consumption device including the battery of the first aspect.

In some embodiments, the power consuming device is a vehicle, a ship, or a spacecraft.

According to a third aspect, there is provided a method for manufacturing a battery, and the steps include providing a battery cell, the battery cell including a pressure relief mechanism, the pressure relief mechanism being installed on a first wall of the battery cell, the pressure release mechanism is activated to release the internal pressure when the internal pressure or temperature of the battery cell reaches a threshold; and providing a thermal management member for containing a fluid. and attaching a first surface of the thermal management member to the first wall of the battery cell, wherein the thermal management member is configured to absorb waste expelled from within the battery cell when the pressure relief mechanism is actuated. passing the exhaust to the thermal management member.

In some embodiments, the thermal management member is provided with a thinned region, and the thinned region is disrupted by the effluent when the pressure relief mechanism is actuated, directing the effluent to the thinned region. is configured to pass through.

In some embodiments, the thermal management member is provided with a groove located opposite the pressure relief mechanism, and the thinned region is formed in a bottom wall of the groove.

In some embodiments, the thermal management member includes a first thermally conductive plate and a second thermally conductive plate, the first thermally conductive plate being between the first wall and the second thermally conductive plate. and attached to the first wall, a first region of the first heat conductive plate is recessed toward the second heat conductive plate to form the groove, and the first region is attached to the second heat conductive plate. connected to the board.

In some embodiments, a through hole is installed in the first region, and the radial size of the through hole is less than the radial size of the groove.

According to a fourth aspect, there is provided a battery manufacturing apparatus including a module for carrying out the method of the third aspect.

The drawings described herein are used to provide a further understanding of this application and constitute a part of this application, and the illustrative embodiments of this application and their descriptions are used to interpret this application and are incorporated herein by reference. does not constitute an inappropriate limitation.

1 is a schematic diagram of a vehicle according to an embodiment of the present application. FIG. 1 is a schematic structural diagram of a battery according to an embodiment of the present application. FIG. 1 is a schematic structural diagram of a battery module according to an embodiment of the present application. FIG. 1 is an exploded view of a battery cell according to an embodiment of the present application. FIG. 3 is an exploded view of a battery cell according to another embodiment of the present application. FIG. 1 is a schematic structural diagram of a battery according to an embodiment of the present application. FIG. 1 is a schematic structural diagram of a battery according to an embodiment of the present application. FIG. 1 is a schematic structural diagram of a battery according to an embodiment of the present application. FIG. 1 is a schematic plan view of a battery according to an embodiment of the present application. 9a is a schematic cross-sectional view taken along line AA of the battery shown in FIG. 9a; FIG. FIG. 9b is an enlarged view of section B of the battery shown in FIG. 9b; FIG. 2 is a schematic three-dimensional diagram of a heat management member according to an embodiment of the present application. FIG. 10a is a schematic cross-sectional view along line AA of the thermal management member shown in FIG. 10a. FIG. 2 is an exploded view of a thermal management member according to an embodiment of the present application. FIG. 1 is a schematic structural diagram of a battery according to an embodiment of the present application. FIG. 1 is a schematic structural diagram of a battery according to an embodiment of the present application. FIG. 1 is a schematic structural diagram of a battery according to an embodiment of the present application. FIG. 1 is a schematic structural diagram of a battery according to an embodiment of the present application. FIG. 1 is a schematic structural diagram of a battery according to an embodiment of the present application. FIG. 1 is a schematic structural diagram of a battery according to an embodiment of the present application. FIG. 1 is a schematic structural diagram of a battery according to an embodiment of the present application. FIG. 1 is an exploded view of a battery according to an embodiment of the present application. 1 is an exemplary flowchart of a battery manufacturing method according to an embodiment of the present application. FIG. 1 is an exemplary block diagram of a battery manufacturing apparatus according to an embodiment of the present application.

In order to make the objectives, technical solutions and advantages of the embodiments of the present application more clear, the technical solutions of the embodiments of the present application will be clearly explained below with reference to the drawings in the embodiments of the present application, and as is clear, The described embodiments are only some, but not all, embodiments of the present application. Based on the embodiments of this application, all other embodiments that a person skilled in the art can obtain without any creative effort will fall within the protection scope of this application.

Unless otherwise defined, technical or scientific terms used herein have the same meanings as commonly understood by one of ordinary skill in the art. In this application, the terms used in the specification of the application are only for explaining specific embodiments, and do not limit the application. The terms "comprising", "having" and any variations thereof in the description are intended to cover non-exclusive inclusion. The terms "first", "second", etc. in the specification and claims of the present application or the above-mentioned drawings are not used to explain a specific order or a master-servant relationship, but are used to distinguish different objects. .

References in this application to "an embodiment" mean that a particular feature, structure, or characteristic described in combination with the embodiments may be included in at least one embodiment of the present application. The appearances of the phrase in various places in the specification are not necessarily referring to the same embodiment, nor are they mutually exclusive independent or alternative embodiments. Those skilled in the art will understand that the embodiments described in this application can be combined with other embodiments, either explicitly or implicitly.

In the description of this application, it is necessary to explain that unless there is a specific provision or limitation, the terms "attachment", "coupling", "connection", "attachment" should be understood in a broad sense, e.g. , may be fixedly connected, removably connected, or integrally connected. The two elements may be directly connected, indirectly connected through an intermediate medium, or communicated within two elements. Those skilled in the art can understand the specific meanings of the above terms in this application depending on the specific situation.

The term "and/or" in this application is only used to explain the related relationship of related objects, and indicates that there are three types of relationships; for example, A and/or B means that A alone It refers to three types of situations: A and B exist at the same time, and B exists alone. Further, the character "/" in the present application generally indicates that the related objects before and after the character are "or".

"Plurality" appearing in this application refers to two or more (including two), and similarly, "multiple groups" refers to two or more groups (including two groups); "Multiple sheets" refers to two or more sheets (including two sheets).

In the present application, the battery cell may include a lithium ion secondary battery, a lithium ion primary battery, a lithium sulfur battery, a sodium lithium ion battery, a sodium ion battery, a magnesium ion battery, etc., and the embodiments of the present application are not limited thereto. . The battery cells may be cylindrical, flat, rectangular, or other shapes, and the embodiments of the present application are not limited thereto either. Battery cells are generally classified into cylindrical battery cells, prismatic battery cells, and soft pack battery cells according to their packaging methods, and the embodiments of the present application are not limited thereto.

The battery referred to in the embodiments of this application is a single physical module containing one or more battery cells to provide higher voltage and capacity. For example, batteries referred to in this application may include battery modules, battery packs, and the like. Batteries typically include a box for packaging one or more battery cells. The box can prevent liquids and other foreign objects from adversely affecting the charging or discharging of the battery cells.

A battery cell includes an electrode assembly and an electrolyte, and the electrode assembly consists of a positive electrode plate, a negative electrode plate, and a separator. Battery cells primarily rely on the movement of metal ions between positive and negative plates to operate. The positive electrode plate includes a positive electrode current collector and a positive electrode active material layer, and the positive electrode active material layer is coated on the surface of the positive electrode current collector, and the current collector that is not coated with the positive electrode active material layer is coated with the positive electrode active material layer. The current collector that protrudes from the current collector and is not coated with the positive electrode active material layer is used as a positive electrode tab. Taking a lithium ion battery as an example, the material of the positive electrode current collector may be aluminum, and the positive electrode active material may be lithium cobalt oxide, lithium iron phosphate, ternary lithium, lithium manganate, or the like. The negative electrode plate includes a negative electrode current collector and a negative electrode active material layer, and the negative electrode active material layer is coated on the surface of the negative electrode current collector, and the current collector that is not coated with the negative electrode active material layer is coated with the negative electrode active material layer. The current collector that protrudes from the current collector and is not coated with the negative electrode active material layer is used as a negative electrode tab. The material of the negative electrode current collector may be copper, and the negative electrode active material may be carbon, silicone, or the like. To ensure that high current flows without blowout, the positive tabs are stacked together in a plurality, and the negative tabs are stacked together in a plurality. The material of the separator may be PP or PE. Further, the electrode assembly may have a wound structure or a laminated structure, and the embodiments of the present application are not limited thereto. The development of battery technology requires simultaneous consideration of various design factors, such as performance parameters such as energy density, cycle life, discharge capacity, and charging/discharging speed, and also requires consideration of battery safety. .

For battery cells, the main safety issues are derived from the charging and discharging process, and at the same time, appropriate environmental temperature design is also necessary, and in order to effectively avoid unnecessary losses, the general safety issues for battery cells are There are at least three safeguards. In particular, the protection means include at least a switching element, selection of a suitable separator material, and a pressure relief mechanism. A switching element is an element that can stop charging or discharging a battery when the temperature or resistance within the battery cell reaches a specific threshold. The separator is used to separate the positive and negative electrode plates, and when the temperature rises to a certain value, it can automatically dissolve microscopic (and even nanolevel) micropores attached to it. This prevents metal ions from passing through the separator, stopping the internal reaction of the battery cell.

The pressure release mechanism is an element or member that is activated to release the internal pressure or temperature when the internal pressure or temperature of the battery cell reaches a predetermined threshold value. The design of the threshold value varies depending on design needs. The threshold value may be determined by one or more of the materials of the positive electrode plate, negative electrode plate, electrolyte, and separator in the battery cell. The pressure release mechanism may take the form of an explosion-proof valve, pneumatic valve, pressure release valve or safety valve, and may specifically adopt a pressure-sensitive or temperature-sensitive element or structure, i.e., inside the battery cell. When the pressure or temperature reaches a predetermined threshold, the pressure relief mechanism performs an operation, or a thinning structure provided within the pressure relief mechanism is destroyed, thereby opening an opening for relieving the internal pressure or temperature. Or a channel is formed.

"Activation" as referred to herein refers to the pressure relief mechanism producing an operation or being activated to a certain state, thereby relieving the internal pressure and temperature of the battery cell. Operation by the pressure relief mechanism includes, but is not limited to, rupturing, crushing, tearing, or opening at least a portion of the pressure relief mechanism. When the pressure release mechanism is activated, high-temperature and high-pressure substances inside the battery cell are discharged from the activated region to the outside as waste. In this way, the battery cells can be forced to release pressure in situations where the pressure or temperature can be controlled, thereby avoiding potential more serious accidents.

The emissions from the battery cells mentioned in this application include, but are not limited to, electrolyte, dissolved or split positive and negative electrode plates, separator fragments, high temperature and high pressure gases from reactions, flames, and the like.

Pressure relief mechanisms on battery cells have an important impact on battery safety. For example, if a phenomenon such as a short circuit or overcharging occurs, thermal runaway inside the battery cell may occur, causing a sudden rise in pressure or temperature. In such a case, the internal pressure and temperature can be released to the outside by operating the pressure release mechanism, thereby preventing explosion and ignition of the battery cell.

Conventional pressure relief mechanism designs mainly focus on releasing the high pressure and high heat inside the battery cell, that is, discharging the waste to the outside of the battery cell. However, in order to ensure the output voltage or current of the battery, a plurality of battery cells are usually required, and the plurality of battery cells are electrically connected by bus members. The waste discharged from the inside of the battery cell may cause a short circuit phenomenon in the remaining battery cells. For example, if the discharged gold dust is electrically connected to two bus members, the battery causing a short circuit and therefore a safety hazard exists. Furthermore, the high-temperature and high-pressure waste is discharged in the direction in which the pressure release mechanism of the battery cell is installed, and specifically in the direction in which the pressure release mechanism operates, and the force and pressure of such discharge is The destructive force can be very large and may even be sufficient to breach one or more structures in the direction, creating further safety issues.

In view of this, the embodiments of the present application provide a technical solution, in which the wall on which the pressure relief mechanism of the battery cell is installed is attached to the thermal management member, and when the pressure relief mechanism is activated, the waste discharged from inside the battery cell is can pass through the thermal management member and leave the battery cell quickly, reducing the risk of emissions and thereby increasing battery safety.

The thermal management member is used to contain fluid and regulate the temperature of the plurality of battery cells. The fluid here may be a liquid or a gas, and temperature adjustment refers to heating or cooling a plurality of battery cells. When cooling or lowering the temperature of battery cells, the thermal management member is used to contain a cooling fluid to lower the temperature of a plurality of battery cells, and at this time, the thermal management member is also used as a cooling member, cooling system, cooling plate, etc. The fluid contained therein is also referred to as a cooling medium or cooling fluid, and specifically as a cooling liquid or cooling gas. The thermal management member may also be used to heat and raise the temperature of a plurality of battery cells, and embodiments of the present application are not limited thereto. Optionally, the fluid may flow cyclically to achieve a better temperature regulating effect. Optionally, the fluid may be water, a mixture of water and ethylene glycol, air, or the like.

The electrical cavities referred to herein are used to house a plurality of battery cells and bus members. The electrical cavity may be sealed or unsealed. The electrical cavity provides mounting space for the battery cells and bus members. In some embodiments, the electrical cavity may further include structure for securing the battery cells. The shape of the electrical cavity is determined based on the plurality of battery cells and bus members contained therein. In some embodiments, the electrical cavity may be square and have six walls. The electrical cavity is also referred to as a "high voltage cavity" because the battery cells within the electrical cavity are electrically connected to form a high voltage output.

The bus member mentioned in this application is used to realize an electrical connection between a plurality of battery cells, for example a parallel connection or a series connection or a series-parallel connection. The bus member can realize electrical connection between battery cells by connecting the electrode terminals of the battery cells. In some embodiments, the bus member may be secured to the battery cell electrode terminal by welding. Corresponding to the "high voltage cavity", the electrical connection formed by the bus member is also referred to as a "high voltage connection".

The collection cavities referred to in this application are used to collect waste and may be sealed or unsealed. In some embodiments, air or other gas may be included within the collection cavity. There are no electrical connections connected to the voltage output within the collection cavity, corresponding to the "high voltage cavity", and the collection cavity is also referred to as the "low pressure cavity". Optionally or additionally, a liquid, such as a cooling medium, may be included within the collection cavity, or a member may be provided for containing the liquid, such that the collection cavity further lowering the temperature of the incoming effluent. Additionally, the gas or liquid within the collection cavity is optionally recirculating.

Any of the technical solutions described by the embodiments of this application can be applied to various devices using batteries, such as mobile phones, portable devices, laptop computers, electric bicycles, electric toys, power tools, electric cars, ships and space. For example, spacecraft include airplanes, rockets, space shuttles, spacecraft, and the like.

As can be understood, the technical solutions described by the embodiments of the present application are not only applicable to the devices described above, but also applicable to all devices that use batteries, but for convenience of explanation, the following embodiments are This will be explained using an electric car as an example.

For example, as shown in FIG. 1, which is a schematic structural diagram of a vehicle 1 according to an embodiment of the present application, the vehicle 1 may be a fuel vehicle, a gas fuel vehicle, or a new energy vehicle, and a new energy vehicle is a pure electric vehicle. It may be a car, a hybrid electric car, a range extender type electric car, or the like. A motor 40, a controller 30, and a battery 10 may be installed inside the vehicle 1, and the controller 30 is used to control the battery 10 to supply power to the motor 40. For example, the battery 10 may be installed at the bottom, front, or tail of the vehicle 1. The battery 10 can be used to power the vehicle 1, for example, the battery 10 can be used as an operating power source for the vehicle 1, for the circuit system of the vehicle 1, for example to meet the working power needs during startup, navigation and driving of the vehicle 1. used for. In another embodiment of the present application, the battery 10 can be used not only as an operating power source for the vehicle 1, but also as a driving power source for the vehicle 1, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1. can be used for

In order to meet different power demands, the battery may include a plurality of battery cells, where there may be a series connection or a parallel connection or a series-parallel connection between the plurality of battery cells, and the series-parallel connection is: It is a mixture of series and parallel connections. Batteries are also called battery packs. Optionally, the plurality of battery cells are first connected in series or connected in parallel or connected in series-parallel to form a battery module, and then the plurality of battery modules are connected in series or connected in parallel or connected in series-parallel to form a battery. . That is, the plurality of battery cells may directly constitute a battery, or they may first constitute a battery module, and then the battery module may constitute a battery.

For example, as shown in FIG. 2, which is a schematic structural diagram of a battery 10 according to an embodiment of the present application, the battery 10 may include a plurality of battery cells 20. The battery 10 may further include a box (also called a cover), the inside of the box is hollow, and the plurality of battery cells 20 are housed within the box. As shown in Figure 2, the box may include two parts, herein referred to as a first part 111 and a second part 112, respectively, and the first part 111 and the second part 112 are fastened together. The shapes of the first portion 111 and the second portion 112 may be determined based on the shape of the combination of the plurality of battery cells 20, and the first portion 111 and the second portion 112 may both have one opening. good. For example, it is preferable that both the first part 111 and the second part 112 are hollow rectangular bodies, and only one face of each is an opening face, and the opening of the first part 111 and the opening of the second part 112 are are placed opposite each other, and the first part 111 and the second part 112 are fastened together to form a box with a closed chamber. After the plurality of battery cells 20 are connected in parallel, connected in series, or connected in series and parallel to each other and combined, they are placed in a box formed by tightening the first part 111 and the second part 112.

Optionally, battery 10 may further include other structures, which will not be described in detail here. For example, the battery 10 may further include a bus member, which is used to realize an electrical connection between the plurality of battery cells 20, such as a parallel connection, a series connection, or a series-parallel connection. Specifically, the bus member may realize electrical connection between the battery cells 20 by connecting the electrode terminals of the battery cells 20. Furthermore, the bus member can be fixed to the electrode terminal of the battery cell 20 by welding. The electrical energy of the plurality of battery cells 20 may be further channeled through the box via a conductive mechanism. Optionally, the conductive feature may belong to the bus member.

Depending on different power demands, the quantity of battery cells 20 may be set to any value. The plurality of battery cells 20 can be connected in series, parallel, or series-parallel to achieve large capacity or power. Since the number of battery cells 20 contained in each battery 10 may be large, in order to facilitate installation, the battery cells 20 are installed in groups, and each group of battery cells 20 constitutes a battery module. It's also good. The number of battery cells 20 included in the battery module is not limited and may be set according to demand. For example, FIG. 3 is one example of a battery module. A battery may include a plurality of battery modules, and the battery modules may be connected in a series, parallel, or series-parallel manner.

As shown in FIG. 4, it is a structural schematic diagram of a battery cell 20 according to an embodiment of the present application, and the battery cell 20 includes one or more electrode assemblies 22, a housing 211, and a cover plate 212. The coordinate system shown in FIG. 4 is the same as in FIG. 3. The housing 211 and the cover plate 212 form a casing or battery case 21 . The wall of the housing 211 and the cover plate 212 are both referred to as the wall of the battery cell 20. The housing 211 is determined based on the combined shape of the one or more electrode assemblies 22; for example, the housing 211 may be a hollow rectangular, cubic, or cylindrical shape, and one side of the housing 211 has an opening to facilitate positioning one or more electrode assemblies 22 within housing 211. For example, when the housing 211 is a hollow rectangle or cube, one plane of the housing 211 is an open plane, that is, the plane has no wall and allows communication between the inside and the outside of the housing 211. When the housing 211 is a hollow cylindrical body, the end face of the housing 211 is an open face, that is, the end face has no wall and allows the inside and outside of the housing 211 to communicate with each other. A cover plate 212 covers the opening and is connected to the housing 211, thereby forming a closed cavity in which the electrode assembly 22 is placed. The housing 211 is filled with an electrolyte, such as an electrolytic solution.

The battery cell 20 may further include two electrode terminals 214 , and the two electrode terminals 214 may be installed on the cover plate 212 . The cover plate 212 usually has a flat plate shape, and two electrode terminals 214 are fixed on the flat plate surface of the cover plate 212, and the two electrode terminals 214 are a positive electrode terminal 214a and a negative electrode terminal 214b, respectively. Each electrode terminal 214 is correspondingly installed with one connecting member 23, or also referred to as current collecting member 23, which is located between the cover plate 212 and the electrode assembly 22, and between the electrode assembly 22 and the electrode terminal 214. It is used to realize electrical connection with.

As shown in FIG. 4, each electrode assembly 22 has a first tab 221a and a second tab 222a. The first tab 221a and the second tab 222a have opposite polarities. For example, when the first tab 221a is a positive electrode tab, the second tab 222a is a negative electrode tab. A first tab 221a of one or more electrode assemblies 22 is connected to one electrode terminal via one connecting member 23, and a second tab 222a of one or more electrode assemblies 22 is connected to another connecting member. It is connected to other electrode terminals via 23. For example, the positive terminal 214a is connected to a positive tab via one connecting member 23, and the negative terminal 214b is connected to a negative tab via another connecting member 23.

In the battery cell 20, the electrode assembly 22 may be installed as a single or multiple electrode assemblies 22 according to actual usage requirements, and as shown in FIG. The electrode assembly 22 is installed.

As shown in FIG. 5, it is a structural schematic diagram of a battery cell 20 including a pressure release mechanism 213 according to another embodiment of the present application.

The housing 211, cover plate 212, electrode assembly 22 and connection member 23 in FIG. 5 correspond to the housing 211, cover plate 212, electrode assembly 22 and connection member 23 in FIG. Omitted.

Regarding one wall of the battery cell 20, for example, a pressure release mechanism 213 may be further installed on the first wall 21a shown in FIG. Although the first wall 21a and the housing 211 are separated in FIG. 5 for ease of representation, the housing 211 is not limited to having an opening on the bottom side. The pressure release mechanism 213 is used to operate and release the internal pressure or temperature when the internal pressure or temperature of the battery cell 20 reaches a threshold value.

The pressure release mechanism 213 may be a part of the first wall 21a, or may have a split structure with the first wall 21a, and may be fixed on the first wall 21a by, for example, welding. When the pressure release mechanism 213 is a part of the first wall 21a, for example, the pressure release mechanism 213 may be formed by installing a notch on the first wall 21a, and the first wall 21a corresponding to the notch may be formed. is less than the thickness of other areas of the pressure relief mechanism 213 other than the notch.

The location of the notch is the thinnest location of the pressure relief mechanism 213. If the gas generated by the battery cell 20 is too large and the internal pressure of the housing 211 becomes high and reaches the threshold value, or the internal reaction of the battery cell 20 causes a heat amount and the temperature inside the battery cell 20 becomes high and reaches the threshold value, The pressure release mechanism 213 can rupture at the notch to connect the inside and outside of the housing 211, and the pressure and temperature of the gas can be released to the outside by the rupture of the pressure release mechanism 213, further causing the battery cell 20 to explode. occurrence is avoided.

Optionally, in one embodiment of the present application, when the pressure release mechanism 213 is installed on the first wall 21a of the battery cell 20, as shown in FIG. The second wall is different from the first wall 21a.

The second wall and the first wall 21a are selectively installed to face each other. For example, the first wall 21a may be the bottom wall of the battery cell 20, and the second wall may be the top wall of the battery cell 20, that is, the cover plate 212.

Optionally, as shown in FIG. 5, the battery cell 20 may further include a pad 24 located between the electrode assembly 22 and the bottom wall of the housing 211 to support the electrode assembly 22. In addition, it can effectively prevent the electrode assembly 22 from interfering with the corner rounding around the bottom wall of the housing 211. Also, one or more through holes may be installed on the pad 24, for example, a plurality of evenly arranged through holes may be installed, or the pressure relief mechanism 213 may be installed in the housing 211. When installed in the bottom wall, a through hole may be installed at a position corresponding to the pressure release mechanism 213 to facilitate liquid and gas conduction; specifically, in this way, the pad 24 The spaces between the upper and lower surfaces communicate with each other, and both the gas and electrolyte inside the battery cell 20 can freely pass through the pad 24 .

By installing the pressure relief mechanism 213 and the electrode terminal 214 on different walls of the battery cell 20 , when the pressure relief mechanism 213 is activated, the discharge of the battery cell 20 is further away from the electrode terminal 214 , thereby causing the discharge from the electrode terminal 214 and the impact of emissions on the bus members, thus increasing the safety of the battery.

Further, when the electrode terminal 214 is installed on the cover plate 212 of the battery cell 20, the pressure release mechanism 213 is installed on the bottom wall of the battery cell 20, so that when the pressure release mechanism 213 is activated, the pressure release mechanism 213 is installed on the bottom wall of the battery cell 20. The waste is discharged to the bottom of the battery 10. Thus, on the one hand, thermal management elements etc. at the bottom of the battery 10 can be utilized to reduce the risk of emissions, and on the other hand, the bottom of the battery 10 is typically away from the user, thereby preventing harm to the user. can be reduced.

Pressure relief mechanism 213 may be a variety of possible pressure relief structures, and embodiments of the present application are not limited thereto. For example, the pressure release mechanism 213 may be a temperature-sensitive pressure release mechanism, and the temperature-sensitive pressure release mechanism is configured to melt when the internal temperature of the battery cell 20 in which the pressure release mechanism 213 is installed reaches a threshold value. and/or the pressure release mechanism 213 may be a pressure-sensitive pressure release mechanism, and the pressure-sensitive pressure release mechanism ruptures when the internal pressure of the battery cell 20 in which the pressure release mechanism 213 is installed reaches a threshold value. configured to be able to do so.

FIG. 6 is a schematic diagram of a battery 10 according to an embodiment of the present application. As shown in FIG. 6, the battery 10 may include a battery cell 20 and a thermal management member 13.

The battery cell 20 includes a pressure release mechanism 213, the pressure release mechanism 213 is installed on the first wall 21a of the battery cell 20, and the pressure release mechanism 213 is activated when the internal pressure or temperature of the battery cell 20 reaches a threshold value. used to release internal pressure or temperature. For example, battery cell 20 may be battery cell 20 in FIG. 5 .

The heat management member 13 is used to accommodate fluid and adjust the temperature of the plurality of battery cells 20 . When lowering the temperature of the battery cells 20, the heat management member 13 can accommodate a cooling medium to adjust the temperature of the plurality of battery cells 20. At this time, the heat management member 13 is a cooling member, a cooling system, or a cooling Also called a board. The thermal management member 13 may also be used for heating, and embodiments of the present application are not limited thereto. Optionally, the fluid may be circulated in order to achieve a better temperature regulating effect.

The first surface (the top surface shown in FIG. 6) of the thermal management member 13 is attached to the first wall 21a. That is, the wall on which the pressure release mechanism 213 of the battery cell 20 is installed is attached to the thermal management member 13. The thermal management member 13 is configured to be disrupted by the exhaust discharged from within the battery cell 20 when the pressure release mechanism 213 is activated, allowing the exhaust to pass through the thermal management member 13 .

In the embodiment of the present application, the first surface of the thermal management member 13 is attached to the first wall 21a on which the pressure relief mechanism 213 is installed, thus, when the pressure relief mechanism 213 is activated, the discharge of the battery cell 20 is is discharged to the thermal management member 13, and at the same time, the thermal management member 13 is destroyed by the exhaust discharged from within the battery cell 20 when the pressure release mechanism 213 is activated, allowing the exhaust to pass to the thermal management member 13. It is configured as follows. In this way, the waste can be quickly evacuated through the thermal management member 13 and away from the battery cell 20, reducing the risk thereof and thereby increasing the safety of the battery.

Optionally, as shown in FIG. 7, in one embodiment of the present application, the thermal management member 13 is provided with a thinned region 135 to facilitate passage of waste through the thermal management member 13; The thinned region 135 is configured to be disrupted by the exhaust when the pressure relief mechanism 213 is actuated, allowing the exhaust to pass through the thinned region 135.

Optionally, thinned region 135 and pressure relief mechanism 213 may be located opposite each other. In this way, when the pressure relief mechanism 213 is actuated, the ejecta can directly impinge on the thinned region 135 and open the thinned region 135.

The thinned region 135 may employ a variety of installations that can be easily destroyed by exudates, and embodiments of the present application are not limited thereto, as described below by way of example.

Optionally, as shown in FIG. 8, in one embodiment of the present application, the thermal management member 13 is provided with a groove 134 disposed opposite the pressure release mechanism 213, and the bottom wall of the groove 134 is thin. A chemical region 135 is formed. Since the bottom wall of the groove 134 is thinner than other areas of the thermal management member 13, it is easily destroyed by the exhaust, and when the pressure release mechanism 213 is activated, the exhaust can destroy the bottom wall of the groove 134. It can pass through the thermal management member 13.

Optionally, the groove 134 is located on the surface of the thermal management member 13 facing the first wall 21a. That is, the opening of the groove 134 faces the first wall 21a.

As can be understood, the opening of the groove 134 may be located on the opposite side of the first wall 21a. In such a case, the bottom wall of the groove 134 is easily destroyed by the discharged material as well.

The thermal management member 13 may be formed of a thermally conductive material to form a fluid runner. Fluid flows in the runners and regulates the temperature of the battery cell 20 by conducting heat through the thermally conductive material. Optionally, the thinned region may have only thermally conductive material but no fluid, forming a thinner layer of thermally conductive material that is more easily destroyed by exudates. For example, the bottom wall of groove 134 may be a thin layer of thermally conductive material to form thinned region 135.

Optionally, as shown in FIGS. 9a-9c, in one embodiment of the present application, the thermal management member 13 may include a first thermally conductive plate 131 and a second thermally conductive plate 132. The first heat conduction plate 131 and the second heat conduction plate 132 form a runner 133, which is used to accommodate fluid. The first heat conductive plate 131 is located between the first wall 21a and the second heat conductive plate 132, and is attached to the first wall 21a. The first region 131 a of the first heat conductive plate 131 is recessed toward the second heat conductive plate 132 to form a groove 134 , and the first region 131 a is connected to the second heat conductive plate 132 . Thus, although the runners 133 are formed around the groove 134, there are no runners within the bottom wall of the groove 134, thereby forming a thinned region.

Optionally, the first heat conducting plate 131 or the second heat conducting plate 132 at the bottom wall of the groove 134 may also be removed to form a thinner thinned region. For example, as shown in FIG. 9c, in one embodiment of the present application, a first through hole 136 is installed in the first region 131a, and the radial size of the first through hole 136 is less than the radial size of the groove 134. Yes, that is, removing the first heat conductive plate 131 at the bottom wall of the groove 134 and maintaining the connection between the first heat conductive plate 131 and the second heat conductive plate 132 at the bottom edge of the groove 134, A runner 133 is formed around the groove 134.

The second heat conductive plate 132 corresponding to the first through hole 136 may be selectively thinned, that is, the thickness of the second heat conductive plate 132 corresponding to the first through hole 136 may be reduced. is less than the thickness of the second thermally conductive plate 132 in other areas, thereby making it easier for the thinned areas to be destroyed by emissions. Optionally, thinning grooves may also be provided on the second heat conductive plate 132 corresponding to the first through holes 136.

10a to 10c are schematic diagrams of the thermal management member 13. As shown in FIGS. 10a to 10c, the first heat conductive plate 131 is recessed to form a groove 134, and the second heat conductive plate 132 has no runner in the area corresponding to the groove 134 and has a thinned groove 132a. After the first heat conduction plate 131 and the second heat conduction plate 132 are installed, a thinned region is formed on the bottom wall of the groove 134.

As can be appreciated, other thinning methods may also be employed to thin the bottom wall of the groove 134, such as a blind hole or a stepped hole on the first region 131a of the first thermally conductive plate 131. and/or a blind hole or the like may be provided on the second heat conductive plate.

Optionally, in one embodiment of the present application, the thickness of the thinned region 135 is 3 mm or less. For example, the thickness of thinned region 135 may be 1 mm or less.

In addition to employing a thinned region 135 that is thinner in thickness, a thinned region 135 of a lower melting point material may be employed, thereby making it more susceptible to melting by the effluent. That is, the thinned region 135 may have a lower melting point than the remainder of the thermal management member 13. For example, the material used for thinned region 135 has a melting point of less than 400°C.

As can be seen, the thinned region 135 may simultaneously adopt a low melting point material and a thinner thickness, that is, the above two embodiments may be implemented separately or in combination. You can.

Optionally, in one embodiment of the present application, thermal management member 13 is configured to collapse upon actuation of pressure relief mechanism 213, allowing fluid to be expelled from the interior of thermal management member 13.

Specifically, when the pressure release mechanism 213 is actuated, the thermal management member 13 is destroyed and the fluid is discharged from the interior of the thermal management member 13, thus absorbing and discharging the heat of the battery cell 20. It can lower the temperature of objects and further reduce the risk of emissions. The fluid is cooled and the temperature of the discharge of the battery cell 20 can be lowered quickly, without causing more serious effects on other parts of the battery, such as other battery cells 20, thereby It is possible to timely suppress the destructiveness of a single battery cell 20 due to an abnormality, thereby reducing the possibility of battery explosion.

Optionally, in one embodiment of the present application, a portion of the thermal management member 13 located around the thinned region 135 may be disrupted by the exudate to allow fluid to exit from the interior of the thermal management member 13 .

Specifically, when the pressure release mechanism 213 is activated, the discharged material of the battery cell 20 first destroys (breaks through or melts) the thinned region 135, passes through the thinned region 135, and is discharged. The object may further destroy the area around the thinned region 135, e.g., the hot exhaust material may melt the surrounding thermal management member 13, causing fluid to exit from the interior of the thermal management member 13, thereby causing high heat exhaustion. Lower the temperature of things. The temperature of the effluent is so high that regardless of whether the fluid heats or cools the battery cell 20, the temperature of the fluid is below the temperature of the effluent, thus allowing the effluent to be cooled.

Optionally, in one embodiment of the present application, when the thermal management member 13 is provided with the groove 134, the side surface of the groove 134 is destroyed by the discharged material, causing the fluid to be discharged from the interior of the thermal management member 13. I can do it.

When the groove 134 is adopted, when the pressure release mechanism 213 is activated, the discharge of the battery cell 20 will enter the groove 134, and since the bottom wall of the groove 134 is thinner, the discharge will flow into the bottom wall of the groove 134. The waste that has broken through the heat management member 13 and entered the groove 134 can further melt the sides of the groove 134 at the same time, allowing the fluid to be discharged from the inside of the heat management member 13. , thereby lowering the temperature of the hot exhaust.

Optionally, the radial size of the groove 134 gradually decreases in the direction away from the pressure relief mechanism 213. That is, the side surface of the groove 134 is an inclined surface, and in this way, the contact area with the discharged material can be increased, making it easier to be destroyed by the discharged material. For example, the angle range of the inclination angle of the side surface of the groove 134 (included angle with the plane on which the bottom wall is located) may be 15 to 85 degrees.

When activated, the pressure release mechanism 213 deforms and communicates the interior and exterior of the battery cell 20. For example, for the pressure relief mechanism 213 employing a notch, when the pressure relief mechanism 213 is actuated, it will burst at the notch and open to both sides, and the pressure relief mechanism 213 will correspondingly require a certain amount of deformation space. In one embodiment of the present application, groove 134 is configured as a relief cavity that opens when pressure relief mechanism 213 is actuated. The escape cavity provides a deformation space for the pressure relief mechanism 213 to cause the pressure relief mechanism 213 to deform toward the thermal management member 13 and rupture.

When used as an escape cavity, the groove 134 must be installed to meet the condition of being opened when the pressure release mechanism 213 is activated. Specifically, the depth of the groove 134 is related to the size of the pressure relief mechanism 213. In one embodiment of the present application, the depth of the groove 134 is greater than 1 mm. For example, the depth of the groove 134 may be 3 mm or more, so that the pressure release mechanism 213 can be easily opened. The area of the opening of the groove 134 is related to the area of the pressure relief mechanism 213. In order to open the pressure release mechanism 213, the ratio of the area of the opening of the groove 134 to the area of the pressure release mechanism 213 needs to be larger than a specific value. Further, in order to make it easier for the side surfaces of the groove 134 to be destroyed by the discharged material, the ratio of the area of the opening of the groove 134 to the area of the pressure release mechanism 213 needs to be less than a certain value. For example, the ratio of the area of the opening of the groove 134 to the area of the pressure release mechanism 213 may range from 0.5 to 2.

When installing the pressure release mechanism 213 on the first wall 21a of the battery cell 20, at least a portion of the pressure release mechanism 213 protrudes from the first wall 21a, thus making it easy to install the pressure release mechanism 213 and attaching it to the battery cell 20. 20 internal space can be secured. Optionally, as shown in FIG. 11, in one embodiment of the present application, the escape cavity accommodates at least a portion of the pressure relief mechanism 213 when at least a portion of the pressure relief mechanism 213 protrudes from the first wall 21a. It may be used to In this way, the first wall 21a of the battery cell 20 can be closely attached to the surface of the thermal management member 13, which not only facilitates the fixing of the battery cell 20 but also saves space and improves thermal management. Efficiency can be improved, and when the pressure relief mechanism 213 is activated, the exhaust of the battery cell 20 can be discharged towards the escape cavity and away from the battery cell 20, reducing the risk of Battery safety can be improved.

Optionally, in one embodiment of the present application, a portion of the first wall 21a located around the pressure relief mechanism 213 protrudes outward, and the relief cavity is formed by a protrusion portion of the first wall 21a located around the pressure relief mechanism 213. It is used to accommodate. Similarly, when the portion of the first wall 21a located around the pressure release mechanism 213 is protruded, the escape cavity can ensure that the first wall 21a of the battery cell 20 can be tightly attached to the surface of the thermal management member 13. , it can not only facilitate the fixing of the battery cells 20, but also save space and improve thermal management efficiency.

As can be seen, in addition to installing a structure on the thermal management member 13 that allows the thermal management member 13 to be destroyed when the pressure relief mechanism 213 is actuated, A structure may be provided that allows the management member 13 to be destroyed when the pressure relief mechanism 213 is actuated.

Optionally, in one embodiment of the present application, a rupture device is disposed on the pressure relief mechanism 213, and the rupture device ruptures the thermal management member 13 when the pressure relief mechanism 213 is actuated to release fluid from the thermal management member 13. It is used to discharge water from inside. For example, the breaking device may be a barb, although embodiments of the present application are not limited thereto.

Optionally, in one embodiment of the present application, as shown in FIG. 12, the battery 10 may further include an electrical cavity 11a and a collection cavity 11b. Thermal management member 13 is used to separate electrical cavity 11a and collection cavity 11b. "Separate" here means to separate, and does not need to be sealed.

The electrical cavity 11a is used to accommodate a plurality of battery cells 20. Electrical cavity 11a may further be used to house bus member 12. The electric cavity 11a provides a housing space for the battery cells 20 and the bus member 12, and the shape of the electric cavity 11a may be determined based on the plurality of battery cells 20 and the bus member 12. The bus member 12 is used to electrically connect the plurality of battery cells 20. The bus member 12 can realize electrical connection between the battery cells 20 by connecting the electrode terminals 214 of the battery cells 20. Collection cavity 11b is used to collect waste when pressure relief mechanism 213 is activated.

In the present embodiment, a thermal management member 13 separates the electrical cavity 11a and the collection cavity 11b. That is, the electric cavity 11a for accommodating the plurality of battery cells 20 and the bus member 12 and the collection cavity 11b for collecting the waste are separated. Thus, when the pressure relief mechanism 213 is actuated, the discharge of the battery cell 20 enters the collection cavity 11b, but does not enter the electrical cavity 11a, or enters in a small amount, thereby affecting the electrical connections in the electrical cavity 11a. Therefore, the safety of the battery can be improved.

Optionally, in one embodiment of the present application, thermal management member 13 is configured to be disrupted by the exhaust when pressure relief mechanism 213 is actuated, such that the exhaust passes through thermal management member 13 and into collection cavity 11b. be done.

Optionally, in one embodiment of the present application, thermal management member 13 has a wall shared by electrical cavity 11a and collection cavity 11b. As shown in FIG. 12, the thermal management member 13 may be used simultaneously as one wall of the electrical cavity 11a and one wall of the collection cavity 11b. That is, the thermal management member 13 (or a portion thereof) may be used directly as a wall shared by the electrical cavity 11a and the collection cavity 11b, such that the discharge of the battery cells 20 passes through the thermal management member 13. and the presence of the thermal management member 13 allows maximum separation of the emissions from the electrical cavity 11a, thereby reducing the risk of emissions and reducing the risk of battery damage. Increase safety.

Optionally, in one embodiment of the present application, the electrical cavity 11a may be formed by a cover with an opening and a thermal management member 13. For example, as shown in FIG. 13, the cover 110 has an opening (lower opening in FIG. 13). The apertured cover 110 is a semi-closed chamber and has an aperture that communicates with the outside, and the thermal management member 13 covers the aperture to form a chamber, ie, an electrical cavity 11a.

Optionally, the cover 110 may be comprised of multiple parts; for example, as shown in FIG. 14, the cover 110 may include a first part 111 and a second part 112. The second portion 112 has openings on both sides, the first portion 111 covers the opening on one side of the second portion 112, the heat management member 13 covers the opening on the other side of the second portion 112, This forms an electrical cavity 11a.

The embodiment of FIG. 14 can be obtained by improving on the basis of FIG. Specifically, the bottom wall of the second portion 112 in FIG. 2 is replaced with the thermal management member 13, and the thermal management member 13 is used as one wall of the electrical cavity 11a, thereby forming the electrical cavity 11a in FIG. In other words, the bottom wall of the second portion 112 in FIG. 2 is removed, that is, an annular wall with openings on both sides is formed, and the first portion 111 and the heat management member 13 cover the openings on both sides of the second portion 112, respectively. However, it is also possible to form a chamber, ie, an electrical cavity 11a.

Optionally, in one embodiment of the present application, the collection cavity 11b may be formed of a thermal management member 13 and a protection member. For example, as shown in FIG. 15, the battery 10 further includes a protection member 115. The protective member 115 is used to protect the thermal management member 13, and the protective member 115 forms a collection cavity 11b with the thermal management member 13. The collection cavity 11b formed by the protection member 115 and the thermal management member 13 does not occupy the space for accommodating the battery cells, thus allowing the installation of a collection cavity 11b with a larger space, thereby allowing the waste to be collected. It can be effectively collected and buffered to reduce that risk.

Optionally, in one embodiment of the present application, a fluid, such as a cooling medium, may be further disposed within the collection cavity 11b, or a member for accommodating a fluid may be disposed within the collection cavity 11b. Further lowers the temperature of the exhaust entering the interior.

Optionally, in one embodiment of the present application, collection cavity 11b may be a sealed chamber. For example, the connection between the protection member 115 and the thermal management member 13 may be sealed with a sealing member.

Optionally, in one embodiment of the present application, collection cavity 11b may not be a sealed chamber. For example, the collection cavity 11b may be in communication with air, and in this way some of the waste may be further discharged outside the collection cavity 11b.

In the embodiment described above, thermal management member 13 covers the opening in cover 110 to form electrical cavity 11a, and thermal management member 13 and protection member 115 form collection cavity 11b. Optionally, the thermal management member 13 may directly separate the sealed cover into the electrical cavity 11a and the collection cavity 11b.

For example, as shown in FIG. 16, in one embodiment of the present application, thermal management member 13 is installed within cover 110 and separates the interior of cover 110 into electrical cavity 11a and collection cavity 11b. That is, the sealed cover 110 forms a chamber therein, and the thermal management member 13 separates the chamber inside the cover 110 into two chambers: an electrical cavity 11a and a collection cavity 11b.

Since the electrical cavity 11a requires a large space to accommodate the plurality of battery cells 20, etc., the heat management member 13 may be installed near the wall where the cover 110 is located, thereby making it possible to Separated into a cavity 11a and a collection cavity 11b with a smaller space.

Optionally, as shown in FIG. 17, in one embodiment of the present application, the cover 110 may include a first portion 111 and a second portion 112. The second portion 112 has an opening on one side to form a semi-closed structure. A semi-closed structure is a chamber with an opening. Thermal management member 13 is installed inside the second part 112, and the first part 111 covers the opening of the second part 112. In other words, the thermal management member 13 is first placed within the semi-enclosed second part 112 to separate the collection cavity 11b, and then the first part 111 covers the opening in the second part 112 to provide electrical A cavity 11a is formed.

Optionally, in one embodiment of the present application, electrical cavity 11a is isolated from collection cavity 11b via thermal management member 13. That is, the collection cavity 11b and the electric cavity 11a are not in communication, and the liquid or gas etc. in the collection cavity 11b cannot enter the electric cavity 11a, thereby protecting the electric cavity 11a more effectively. .

FIG. 18 is an exploded view of a battery 10 according to an embodiment of the present application. In the embodiment shown in FIG. 18, the thermal management member 13 is provided with a groove 134 and forms a collection cavity with the protection member 115.

For a description of each member in the battery 10, reference can be made to each of the above embodiments, and for the sake of brevity, detailed description will be omitted here.

An embodiment of the present application further provides a power consuming device, which may include the battery 10 of each of the embodiments described above. Optionally, the power consuming device may be a vehicle 1, a ship or a spacecraft.

The battery and power consumption device of the embodiment of the present application have been explained above, and the battery manufacturing method and device of the embodiment of the present application will be explained below, and parts not explained in detail here will refer to each of the above embodiments. You can refer to it.

FIG. 19 is an exemplary flowchart of a battery manufacturing method 300 according to one embodiment of the present application. As shown in FIG. 19, the method 300 may include steps 310-330.
310, a battery cell 20 is provided, the battery cell 20 includes a pressure relief mechanism 213, the pressure relief mechanism 213 is installed on the first wall 21a of the battery cell 20, and the pressure relief mechanism 213 is configured to reduce the internal pressure or temperature of the battery cell 20; It is used to activate and release internal pressure or temperature when the temperature reaches a threshold value.
320, providing a thermal management member 13 for containing fluid.
330, attaching the first surface of the thermal management member 13 to the first wall 21a of the battery cell 20, the thermal management member 13 being destroyed by the exhaust discharged from within the battery cell 20 when the pressure release mechanism 213 is activated; The exhaust may be passed through the thermal management member 13.

FIG. 20 is an exemplary block diagram of a battery manufacturing apparatus 400 according to an embodiment of the present application. As shown in FIG. 21, the battery manufacturing apparatus 400 may include a providing module 410 and a mounting module 420.

The provision module 410 provides the battery cell 20, the battery cell 20 includes a pressure release mechanism 213, the pressure release mechanism 213 is installed on the first wall 21a of the battery cell 20, and the pressure release mechanism 213 is The thermal management member 13 is actuated to release the internal pressure or temperature when the internal pressure or temperature of the battery cell 20 reaches a threshold value, and the thermal management member 13 is provided for containing a fluid. used.

The mounting module 420 is used to attach the first surface of the thermal management member 13 to the first wall 21a of the battery cell 20, and the thermal management member 13 is configured to release heat from within the battery cell 20 when the pressure release mechanism 213 is activated. It is destroyed by the discharged effluents, and the effluents can be passed through the thermal management member 13 .

As will be explained in the end, the above embodiments are only for illustrating the technical solution of the present application, but are not intended to limit it, and although the present application has been explained in detail with reference to the above embodiments, The vendor can still modify the technical solutions described in the above embodiments or make equivalent substitutions for some technical features, but the essence of the technical solutions to which these modifications and substitutions correspond to the present application. It should be understood that nothing is intended to depart from the spirit and scope of the technical solution of each embodiment.

1 Vehicle 10 Battery 11 Electric cavity 12 Bus member 13 Heat management member 20 Battery cell 21 Battery case 21a First wall 22 Electrode assembly 23 Connection member 24 Pad 30 Controller 40 Motor 110 Cover 111 First portion 112 Second portion 115 Protective member 131 First heat conduction plate 131a First region 132 Second heat conduction plate 132a Thinned groove 133 Runner 134 Concave groove 135 Thinned region 136 Through hole 211 Housing 212 Second tab 212 Cover plate 213 Pressure release mechanism 214 Electrode terminal 221 First Tab 222 Second tab

Claims (14)

A battery,
A battery cell including a pressure release mechanism, wherein the pressure release mechanism is installed on a first wall of the battery cell, and the pressure release mechanism is activated when an internal pressure or temperature of the battery cell reaches a threshold value. a battery cell used to release the internal pressure or temperature;
a thermal management member for containing fluid and regulating the temperature of the battery cell;
a first surface of the thermal management member is attached to the first wall of the battery cell, and the thermal management member is disrupted by emissions expelled from within the battery cell when the pressure relief mechanism is actuated; configured to pass the exhaust through the thermal management member ;
The battery further includes:
an electrical cavity for accommodating a plurality of the battery cells;
a collection cavity for collecting the effluent when the pressure relief mechanism is actuated;
the thermal management member is used to separate the electrical cavity and the collection cavity;
The thermal management member is configured to be disrupted by the effluents when the pressure relief mechanism is actuated, such that the effluents pass through the thermal management member and into the collection cavity. A thinned region is disposed in the thermal management member, and the thinned region is configured to be disrupted by the exhaust material when the pressure relief mechanism is actuated to allow the waste material to pass through the thinned region. The battery according to claim 1. 3. The battery according to claim 2, wherein the thermal management member is provided with a groove installed to face the pressure release mechanism, and the thinned region is formed on a bottom wall of the groove. The battery according to claim 3, wherein the groove is installed on a surface of the thermal management member facing the first wall. The thermal management member includes a first thermally conductive plate and a second thermally conductive plate, the first thermally conductive plate is located between the first wall and the second thermally conductive plate, and the first thermally conductive plate is located between the first wall and the second thermally conductive plate. wherein the first region of the first heat conduction plate is recessed toward the second heat conduction plate to form the groove, and the first region is connected to the second heat conduction plate. The battery according to item 4. The battery according to claim 5, wherein a through hole is installed in the first region, and a radial size of the through hole is smaller than a radial size of the groove. A battery according to any one of claims 2 to 6, wherein a portion of the thermal management member located around the thinned region is destroyed by the exudate, causing the fluid to be expelled from the interior of the thermal management member. . The battery according to any one of claims 3 to 6, wherein the side surfaces of the groove are destroyed by the discharged material to cause the fluid to be discharged from the interior of the thermal management member. 9. The battery of claim 8, wherein the radial size of the groove gradually decreases in a direction away from the pressure release mechanism. The battery according to any one of claims 3 to 6, wherein the groove is configured as an escape cavity that is opened when the pressure release mechanism is activated. 11. The battery according to claim 10, wherein the depth of the groove is greater than 1 mm. A battery according to any one of claims 10 to 11, wherein at least a part of the pressure relief mechanism projects from the first wall, and the relief cavity is used to accommodate the at least part of the pressure relief mechanism. . An electrode terminal is installed on a second wall of the battery cell, and the second wall is different from the first wall, and the second wall and the first wall are installed opposite each other. A battery according to any one of the items. A power consumption device comprising the battery according to any one of claims 1 to 13 .

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